Fire a strong, consistent spark with the DENSO Iridium Power Spark Plug (MPN 5366), built around the world's smallest 0.4mm iridium center electrode for improved spark and maximized combustion. It's a direct-fit replacement for a wide range of powersports applications — including the 2009 BMW G450X, 2008-2010 BUELL 1125R, 2004-2008 KAWASAKI JT1500 STX-15F, 1994-2003 KAWASAKI ZX900 NINJA ZX-9R, 1996-2005 SUZUKI GSX600F KATANA, 2006-2010 TRIUMPH DAYTONA 675 and 2004-2008 YAMAHA YZF-R1. See the Buyer's Guide tab for the full list of fitments.
Iridium center electrode: the world's smallest 0.4mm iridium tip helps improve spark for maximum combustion.
Ground electrode design: U-Groove and taper-cut ground electrode to help promote flame propagation.
Specs: 14.0 mm thread diameter, 19.0 mm reach, 16 mm hex, flat seat, slant ground configuration, single nickel-core ground electrode, copper-core center electrode, 5000 ohm resistance, manufacturer heat range 27, 0.9 mm pre-gap.
Made in Japan.
Quantity used varies by application (this listing is for one plug; sold in a minimum order of four) — check the Buyer's Guide for the count your machine takes.
Interchange: IU27A
This part cross-references / interchanges with the following part numbers:
IU27A
Frequently Asked Questions
What kind of spark plug is this?
It's the DENSO Iridium Power plug (MPN 5366) with the world's smallest 0.4mm iridium center electrode and a U-Groove, taper-cut ground electrode designed to help improve spark and flame propagation.
What are the key specifications?
14.0 mm thread diameter, 19.0 mm reach, 16 mm hex, flat seat, slant ground configuration, iridium center tip on a copper core, nickel-core ground electrode, 5000 ohm resistance, heat range 27, and a 0.9 mm pre-gap.
How many plugs do I need?
Quantity varies by application. This listing is for a single plug, sold in a minimum order of four; check the Buyer's Guide tab for the count your specific machine requires.
Will this fit my bike?
It's a direct-fit replacement for many powersports models, such as the KAWASAKI ZX900 NINJA ZX-9R, SUZUKI GSX600F KATANA, and YAMAHA YZF-R1. Confirm your year, make, and model in the Buyer's Guide tab.
What interchange number does it replace?
It cross-references IU27A. The part's own manufacturer part number is 5366 (Part Eazy SKU 5366) and where it's made is Japan.
Spark Plug StandardPatented U-Groove technology on the ground electrode allows for a larger flame front and improved ignitability. Copper core center electrode for superior thermal conductivity...
WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
